Former Ukrainian Prime Minister Yulia Tymoshenko (C) submits documents to the Ukraine's Central Electoral Commission in Kiev, on January 23, 2019. - Former Ukrainian prime minister Yulia Tymoshenko on January 22, 2019, officially launched her bid for the presidency, with polls showing her as the frontrunner for the country's top political post. Tymoshenko has been a leading figure on the Ukrainian political scene for the last two decades, coming to international prominence through her role in the 2004 Orange Revolution. (Photo by Genya SAVILOV / AFP)

Former Ukrainian Prime Minister Yulia Tymoshenko (rear R) signs papers as she submits documents to the Ukraine's Central Electoral Commission in Kiev, on January 23, 2019. - Former Ukrainian prime minister Yulia Tymoshenko on January 22, 2019, officially launched her bid for the presidency, with polls showing her as the frontrunner for the country's top political post. Tymoshenko has been a leading figure on the Ukrainian political scene for the last two decades, coming to international prominence through her role in the 2004 Orange Revolution. (Photo by Genya SAVILOV / AFP)

Supporters greet former Ukrainian Prime Minister Yulia Tymoshenko (C) after she submitted documents to the Ukraine's Central Electoral Commission in Kiev, on January 23, 2019. - Former Ukrainian prime minister Yulia Tymoshenko on January 22, 2019, officially launched her bid for the presidency, with polls showing her as the frontrunner for the country's top political post. Tymoshenko has been a leading figure on the Ukrainian political scene for the last two decades, coming to international prominence through her role in the 2004 Orange Revolution. (Photo by Genya SAVILOV / AFP)